imp API Cookbook ‘How To Disconnect And/or Deep-sleep Devices Correctly’ Sample Code

onidle.server.disconnect.device.nut

const RETRY_TIME = 120;
const CONNECT_TIMEOUT = 30;

// Set the reconnection/error trigger policy (RETURN_ON_ERROR) early
server.setsendtimeoutpolicy(RETURN_ON_ERROR, WAIT_TIL_SENT, 10); 

function connectHandler(reason) {
    if (reason != SERVER_CONNECTED) {
        // Queue up a reconnection attempt
        imp.wakeup(RETRY_TIME, reconnect);
    } else {
        server.log("Device connected");
    }
}

function reconnect() {
    // Attempt to connect to the server
    server.connect(connectHandler, CONNECT_TIMEOUT);
}

// Use 'imp.onidle()' to register a function that will be called
// when impOS and Squirrel tasks are complete.
// The registered function has no parameters
imp.onidle(function() {
    // Disconnect from the server now it's OK to do so
    server.log("Device disconnecting");
    server.flush(10);
    server.disconnect();
    
    // Queue up a reconnection attempt in 60 seconds
    imp.wakeup(60, reconnect);
});

onidle.server.sleepfor.device.nut

const SLEEP_TIME = 3600;

// Use 'imp.onidle()' to register a function that will be called
// when impOS and Squirrel tasks are complete.
// The registered function has no parameters
imp.onidle(function() {
    // Sleep for 'SLEEP_TIME' seconds now it's OK to do so
    server.sleepfor(SLEEP_TIME);
});